John mcadams



(No Model.)

J. MQADAMS. GONTROLLING DEVIGE POR BLEVATORS.

TME ohms vanas ce., pHoro-Unio.. wAsmNcron! n: c.

'ject of this application.

' UNITED STATES PATENT OFFICE.

JOHN MCADAUS, OF NEW YORK, N. Y.

CONTROLLING DEVICE FOR ELEVATORS.

SPECIFICATION forming part of Letters Patent No. 460,675, dated October6, 1891. Application filed May 13, 1891. Serial No. 392.573. (No model.)

-To all whom t may concern.:

Be it known that I, JOHN MCADAMS, a sublject of Her Majesty the Queen ofGreat Britain, and a resident of New York, in the 'means hereinafterdescribed and claimed,

whereby the attendant in the carriage may conveniently and withreliabilityoperate the pilot-valve, which admits water to the main valveof the hydraulic engine.

Referring to the accompanying drawings, Figure l is a side elevation,partly broken away, 0f an elevator-carriage with connecting mechanismconstructed and arranged in accordance with the invention made the sub-Fig. 2 is a like view of same, but looking at another face of theelevator-carriage. Fig. 3 is a detached elevation of one of the clampsfor connection with the operating-cable. Fig. 4. is a detached ltop Viewot' same; and Fig. 5 is a detached side elevation, partly in section, ofa segment forming one of the details of the mechanism constituting theinvention.

In the drawings, A designates the cab or carriage, provided at asuitable point with the lever B, which is normally vertical and adaptedto be moved on its axis to either side of its vertical center. TheleverBis secured on the rock-shaft C, which is mounted in bearingsfastened to the lower surface of the carriage A, and said lever isprovided with the counter-balance D, suspended below the carriage.

Upon the end of the rock-shaft O opposite to the lever B is mounted theframe E, consisting of the transverse arms F G, having upon their endsthe clamps H I for positive attachment to the continuous cable N,passing over the pulleys J K at the top of the elevator-shaft, and thepulleys L M at the base of said shaft.

The cable N, while continuous, is divided practically into two sections,(lettered O P, respectively,) the former passing over the pulley L andthence upward to the pulleys J K,

while the section P passes over the pulley M, and thence extends upwardto the pulleys J K. The section O of the cableN is firmly secured to thearm F by means of the clamp H, and the section P is likewise secured tothe arm Gr by means of the clamp I, and hence with the rocking of theshaft O through the working of the leverB the sections O P ofthe cablewill be affected, as hereinafter described.

The pulleys L M are mounted upon the ends of the horizontal frame Q,secured upon the end of the rock-shaft R and having the arms S, whoselower extremities are in close proximity to the pulleys L M and preventthe cable N from slipping from said pulleys. rlhe extremities of t-heframe Q also form ngers ff, which aid in preventing the cable fromslipping from the pulleys L M. The frame Q is rigid on the shaft R, andupon said shaft there is also rigidly mounted the vertical frameT,provided at its upper and lower ends with the segments V WV, which aregrooved to receive the cables X Y, the latter at one end resting in saidgrooved segments and being there secured by means of clamps, such as theone lettered Z in Fig. 5. Adjacent to the shaft R there is suitablymounted in bearings the rock-shaft a, carrying the frame b,corresponding with the frame T, above described, and provided with thegrooved seg- .ments b c, .in which the other end of said cables X Y aresecured. The cables X Ythus extend from the segments V W to the segmentsb c, and may be kept taut by means ot' clamps Z.

Upon the shaft ct there is also mounted the cam-wheel e or other mediumfor imparting motion from the shaft c to the pilot-valve, (not shown,)by which water is admitted to the main valve of the hydraulic engine;and it is the purpose ot' the invention to produce adequate meansbetween lthe'lever B in thev carriage and the shaft a whereby, throughthe medium of the cam e or other instrumentality, the attendant in thecarriage may have full control of thel said pilot-valve.

In the operation of the invention it may be understood that the'carriageA will be at rest when the lever B is in its normal or verticalposition, and that when said leverB is turned IOO to the right(referring to Fig. l) the carriage will be ascending, while when saidlever is turned to the left the carriage will be descending, and whensaid lever is again returned to its normal position the carriage willcome to a stop. lVhen the lever B is turned to the right, the frame Ewill move with it, the arm F thereof moving upward and the arm Gdownward, the ei'tect of this movement being that the arm F will drawthe section of the cable N to which it is attached upward and the arm Gwill draw the section of said cable to which it is attached downward,thereby tilting the frame Q at an angle eorresponding with that of thearms F G and turning the shaft R and frame T a definite distance towardthe shaft a. The turning of the shaft R and frame T toward the shaft aoperates, through the cables X Y and frame l), to rotate the shaft a adistance corresponding with the rotation of the shaft R, and thereby tomove the cam e for the purpose of actuating the pilot-valve. (Notshown.) It will thus be seen that when the lever B is turned to theright its movement will be communicated to the shaft a and cam e, andthat thereby the pilot-valve will be moved a deiinite distancecorresponding with the movement of the lever B. When it is desired thatthe elevator-carriage will travel in the opposite direction, the lever Bwill be moved to the left, (see Fig. 1,) whereby the arm F, with itssection of the cable N, will be depressed and the arm G, with itssection of the cable N, elevated, thereby rotating, through the frame Q,the shaft R in a direction opposite to that in which it was before movedwhen the lever B was turned to the right. The rotation ot' the shaft Runder the action of the lever B when turned to the left operates,through the frame T, frame AI), and cables X Y, to cause the shat't aand cam e to have a movement in the same direction as and correspondingwith the shaft R. Thus the cam e, when the lever B is turned to theleft, will have a movement opposite to that imparted to it when saidlever B was turned to the right, and the effect will be to actuate thepilot-valve, (not shown,) and thereby control the iiow of the water andthe operation oi the main valve of the hydraulic engine.

It will be understood from the lforegoing description that when thelever B is in the position illustrated in Fig. l the elevator-carriagewill be at rest; that when said lever is moved to the right the cam ewill be actuated and will operate the pilot-valve to permit the movementot the carriage A in one direction, and that when said lever 113 ismoved to the left the cam e and pilot-valve will be actuated' to permitthe movement of the ele va-tor-carriage in the opposite direction. Thepilot-valve is thus placed under the control of the attendant in thecarriage and its operation is both convenient and reliable.

iVliat l claim as my invention, and desire to secure by Letters Patent,is-

l. The lever to be operated by the attendant in the elevator-carriage,combined with the frame E, the continuous cable N, secured to said frameand passing over pulleys at the upper and lower ends of theelevator-shaft, the frame Q, carrying said pulleys at thelower end ofthe elevator-shaft and mounted upon a roclcshaft, the frame T, mountedupon said shaft, the rock-shaft a, carrying the frame b and connectedwith the frame T, and mech; anism for imparting the motion of the shafta to the pilot-valve, substantially as set forth.

2. The continuous cable N and the lever in the carriage connectedtherewith, said cable passing over pulleys J K at the top of theelevator-shaft, combined with the tilting frame Q, the pulleys L M,carried by said frame and receiving the cable N, the tilting frame T,connections X Y, tilting frame l), and mechanism, substantially asdescribed, intermediate the frame b and the pilot-valve, substantiallyas set forth.

The pulleys J K at the top of the elevator-shaft., the frame Q, mountedon a rockshait at the base of said elevator-shaft, the pulleys L M,mounted on the opposite arms of said frame, and mechanism forcommunieating' the motion of said frame to the pilotvalve, combined withthe tilting frame E, carried by the carriage, and the continuous cableN, composed ot' sections O P, connected, respectively, with the oppositearms of said frame E, the section O passing over the pulley L and toboth pulleys J K and the section l) passing over the pulley M and toboth pulleys J K, substantially as and for the purposes set forth.

Il. The rock-shafts R ct, the frames T b on said shafts, the segments onthe ends of said frames, and the cables X Y, connecting said segments,combined with the frame Q on the shaft R` the pulleys L M on said frameQ, the cable N, the frame E, connected with said cable, and means foroperating the frame E from the elevator-carriage, substantially as setforth.

Signed at New York, in the county ol New York and State of New York,this 9th day of May, A. D. 1891.

JOHN MCADAMS.

Vitnesses:

(inns. C. GILL, En. D. MILLER.

IOO

